Apparatus for drying paper



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H. P. CASE.

APPARATUS FOR DRYING PAPER.

No. 247,163. Patented Sept. 20,1881.

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H. F. CASE.

APPARATUS FOR DRYING PAPER.

Fly-4i Patented Sept. 20,1881.

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UNITED STATES PATENT OFFICE.

HENRY F. CASE, OF SOUTH MANCHESTER, CONNECTICUT.

APPARATUS FOR DRYlNG PAPER.

SPECIFICATION forming part of Letters Patent No. 247,163, dated September 20, 1881.

Application filed July 8, 1881.

To all whom it may concern Beit known that I, HENRY F. CASE, of South Manchesterfin the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Apparatus for Drying Paper; and I do hereby declare that the following is a full, clear, and exact description thereof, whereby a person skilled in the art can make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Like letters in the figures indicate the same parts.

My invention relates to machinery or appar 5 ratus for the more perfect drying of heavy paper and pasteboard than has heretofore been accomplished.

The object of my impovement is to provide a mechanism by which the material can be dried more thoroughly and evenly than heretofore by the use of steam-heaters.

In the accompanying drawin gs,on two sheets, illustrating my invention, Figure 1 shows a front elevation of a drying-chamber contain- 2 5 in g my improvements, having part of the doors open, so as to show the interior. Fig. 2 is a cross-section on the line a a of Fig, 1. Fig. 3 is an end view of one of my improved dryingstacks. Fig. 4 is a top view of the same. Fig.

0 5 is a cross-section on the line b b of Fig. 4. Fig. 6 is a sectional view of the coupling by which the steam-pipe leading into the radiators is connected with the main horizontal steampipe.

3 5 Ais the drying-chamber, which is furnished with doors A, which are closed after the material to be dried is placed within it.

Bis a stack of steam-radiators, forming parallel shelves for the reception of the sheets to 0 be dried. The construction and arrangement of these radiators form one essential feature of my improvement.

C C are the separate pieces of which the stack is composed. They consist of a hollow rect- 4 5 angular part, having parallel flat top and bottom plates, which curve outward at the sides C, so as to form projections outside of the rectangle for their attachment one to the other. These projections at the sides extend above and below the upper and lower faces of the radiator, and are of a cylindrical shape, as

(No model.)

shown at D in the drawings, and when the radiators are placed in a pile these projections form a column at the sides, which supports the structure. Each plate or radiator consists of the middle portion or plate and projections reaching through one-half of the space between two radiators, the whole being hollow, so that steam can pass readily through the whole structure. At the top and bottom of each cylindrical portion, at the sides, there is a flange to give greater hearing or support between the parts, and the whole is secured together by the bolts E and the caps F, which close the top and bottom of the whole stack. As will be seen from thcdrawings,this constructionleaves the openings G for the introduction and drying of the sheets of pasteboard or paper. This stack rests upon suitable supports in the chamber A, and is accessible from the outside of the chamber by means of the doors A.

H and J are steam-pipes communicating with the main steam-pipe which supplies steam for heatingpurposes. This maybe live steam from the boiler or exhaust-steam from the cylinder of an engine. The pipe H communicates with the steam at both its ends H and H while the pipe J communicates with the steam at its end J and communicates at its end J with the waste or drip pipe for carrying off the water of condensation. The pipe J is placed at the bottom of the stack, and the pipe H at about one-third of the distance from the bottom to the top. In a stack of ten shelves or radiators, as shown in the drawings, I place it opposite the third from the bottom.

K is a pipe at the top of the stack for uniting all of the different divisions of the radiators, and several separate stacks to carry off any accumulation of air and create the proper circulation to give a uniform temperature to the whole structure.

L L, &c., are pipes leading from the pipes H J K into the system of heaters, for the purpose of conveying steam to and from the radiators. Those from the pipe H convey only steam from the pipe. Those from the pipe J serve to convey steam to the lower radiator and at the same time carry off the drip. Those from the pipe K serve to carry off accumulated air and form a communication between the top layers of the stack. The pipe K is furnished that the ordinary connections and communi-- cations will not keep all parts of an equal temperature. The intermediate pipe, H, gives an additional and permanent supply of steam ina position to be uninfluenced by the air-pipe above or the drip below, and creates an equilibrium of heat in the stack.

To connect the pipes L with the pipes H, &c., I make use of an improved coupling of the following construction.

M and N are two semicircularparts of aband around the pipe H. They are held together at the top and bottom by the bolts 0 O, passing through ears on the two parts, as shown in Fig. 6. The part M has a projecting portion, M, through which is a round hole, into which the pipe L fits. There is also an open ring in the part M for the packing P. The pipe H has a hole in its side to receive the end of L. In placing these parts together, the pipe L is secured to the heater. The part M is then slipped onto it and the end of L inserted into the hole in the side of H. The packing is then placed around L at P, the part N placedin its proper position, and M and N bolted together, as shown in the drawings. This makes atight joint, and one which will allow of the necessary expansion and contraction. It also takes up less space than the ordinary method of connecting with a cast-iron tee.

The upperpartof myimproveddrying-chamber consists of a series of receptacles for bolding the sheets in a vertical instead of a horizontal position. These are shown at R in Figs. 1 and 2. They are intended for the sheets after they are removed from the heaters below to finish the drying at a somewhat less temperature, so as not to make the sheets too hard and brittle. These receptacles are heated by the heat rising from the radiators below, and the air is not so hot and dry as where the sheets are first put in. This finishes the drying, so as to leave the sheets in the best condition. The receptacles R. are formed by partitions or sides placed vertically above a slatted flooring or supportfor thelower edges of thesheets, and are intended to hold them in such a position that the air rising from the heaters below can circulate around them and carry 05 any remaining moisture.

The chamber Ais intended to be of the usual construction of an ordinary drying-chamber for such purposes, and to be furnished with the customary appliances for a circulation of air through it when required to remove the moisture coming from the material dried.

lVhat I claim as my invention is- 1. The stack or heater B, composed of a series of radiators, each one of which consists of a rectangular .middle portion with side columns of a circular form, and being alike above and below the rectangular part of the radiator and outside of it, said columns uniting by flat surfaces and being provided with an interior flange at the junction of the parts of the column, the whole secured together by the bolts E, substantially as described.

2. The intermediate steam-pipe, H, in combination with the pipes J and K, and the stack B, with which they are connected, substantially as described.

3. The drying-chamber A, in combination with the stack or heater B and the receptacle It, all constructed and arranged substantially as described.

HENRY F. CASE.

Witnesses:

THEo. G. ELLIs, CLARENCE K. WOOSTER. 

